Just booked my tickets for a 21 day Australia trip in March 2010. We will be heading to Adelaide, Great Barrier Reef, Ayer's Rock area and Sydney. I'm looking for tips of where to take pictures. I know there will be plenty of opportunities to do some awesome photography, as this is not a photography trip (going with another couple, all non photographers), are there are places that are must sees? Special vantage points in Sydney to take photos of the harbour / Opera House? I plan on scoping out Sydney my first few days there to find some interesting places to do some night photography and then returning later during our stay. But any heads up is appreciated. Any tips are greatly welcome!